Make functions that accept multiple iterations via C-u N, honour 0.

Except C-k which has a defined behaviour. In mg, C-t doesn't complete
n iterations if requested, but probably should, hence it has been
included in this diff.

3 files changed, 24 insertions, 3 deletions

diff --git a/usr.bin/mg/basic.c b/usr.bin/mg/basic.c
index 56cc517d3ef..85d9f70fce6 100644
--- a/usr.bin/mg/basic.c
+++ b/usr.bin/mg/basic.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: basic.c,v 1.46 2015/09/26 21:51:58 jasper Exp $	*/
+/*	$OpenBSD: basic.c,v 1.47 2015/10/10 09:13:14 lum Exp $	*/
 
 /* This file is in the public domain */
 
@@ -28,6 +28,9 @@
 int
 gotobol(int f, int n)
 {
+	if (n == 0)
+		return (TRUE);
+
 	curwp->w_doto = 0;
 	return (TRUE);
 }
@@ -72,6 +75,9 @@ backchar(int f, int n)
 int
 gotoeol(int f, int n)
 {
+	if (n == 0)
+		return (TRUE);
+
 	curwp->w_doto = llength(curwp->w_dotp);
 	return (TRUE);
 }
diff --git a/usr.bin/mg/paragraph.c b/usr.bin/mg/paragraph.c
index 14d695143fc..ed94b2261f0 100644
--- a/usr.bin/mg/paragraph.c
+++ b/usr.bin/mg/paragraph.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: paragraph.c,v 1.40 2015/09/26 15:03:15 lum Exp $	*/
+/*	$OpenBSD: paragraph.c,v 1.41 2015/10/10 09:13:14 lum Exp $	*/
 
 /* This file is in the public domain. */
 
@@ -142,6 +142,9 @@ fillpara(int f, int n)
 	struct line	*eopline;	/* pointer to line just past EOP	*/
 	char	 wbuf[MAXWORD];	/* buffer for current word		*/
 
+	if (n == 0)
+		return (TRUE);
+
 	undo_boundary_enable(FFRAND, 0);
 
 	/* record the pointer to the line just past the EOP */
@@ -267,6 +270,9 @@ killpara(int f, int n)
 {
 	int	lineno, status;
 
+	if (n == 0)
+		return (TRUE);
+
 	if (findpara() == FALSE)
 		return (TRUE);
 
@@ -298,6 +304,9 @@ markpara(int f, int n)
 {
 	int i = 0;
 
+	if (n == 0)
+		return (TRUE);
+
 	clearmark(FFARG, 0);
 
 	if (findpara() == FALSE)
@@ -326,6 +335,9 @@ transposepara(int f, int n)
 	int	i = 0, status;
 	char	flg;
 
+	if (n == 0)
+		return (TRUE);
+
 	/* find a paragraph, set mark, then goto the end */
 	gotobop(FFRAND, 1);
 	curwp->w_markp = curwp->w_dotp;
diff --git a/usr.bin/mg/util.c b/usr.bin/mg/util.c
index d5b5a06af14..64e9d7659e4 100644
--- a/usr.bin/mg/util.c
+++ b/usr.bin/mg/util.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: util.c,v 1.36 2015/09/29 03:19:24 guenther Exp $	*/
+/*	$OpenBSD: util.c,v 1.37 2015/10/10 09:13:14 lum Exp $	*/
 
 /* This file is in the public domain. */
 
@@ -117,6 +117,9 @@ twiddle(int f, int n)
 	struct line	*dotp;
 	int	 doto, cr;
 
+	if (n == 0)
+		return (TRUE);
+
 	dotp = curwp->w_dotp;
 	doto = curwp->w_doto;